Mobile device and optical imaging lens thereof

ABSTRACT

Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises five lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

INCORPORATION BY REFERENCE

This application claims priority from P.R.C. Patent Application No.201310073629.4, filed on Mar. 8, 2013, the contents of which are herebyincorporated by reference in their entirety for all purposes.

TECHNICAL FIELD

The present invention relates to a mobile device and an optical imaginglens thereof, and particularly, relates to a mobile device applying anoptical imaging lens having five lens elements and an optical imaginglens thereof.

BACKGROUND

The ever-increasing demand for smaller sized mobile devices, such ascell phones, digital cameras, etc. correspondingly triggered a growingneed for a smaller sized photography module, comprising elements such asan optical imaging lens, a module housing unit, and an image sensor,etc., contained therein. Size reductions may be contributed from variousaspects of the mobile devices, which includes not only the chargecoupled device (CCD) and the complementary metal-oxide semiconductor(CMOS), but also the optical imaging lens mounted therein. When reducingthe size of the optical imaging lens, however, achieving good opticalcharacteristics becomes a challenging problem.

U.S. Patent Publication No. 20110176049, 20110316969 and U.S. Pat. No.7,480,105 all disclosed an optical imaging lens constructed with anoptical imaging lens having five lens elements, wherein the first lenselement comprises negative refracting power.

U.S. Patent Publication No. 20100254029, Japan Patent Publication No.2008-281760 and 2012-208326, R.O.C. Patent Publication No. 201227044 andR.O.C. Patent No. M369459 and 1268360 all disclosed an optical imaginglens constructed with an optical imaging lens having five lens elements,wherein the fifth lens element is thicker than other typical designs.

U.S. Patent Publication No. 20120069455, 20120087019 and 20120087020,Japan Patent Publication No. 2010-224521, 2010-152042 and 2010-026434and R.O.C. Patent Publication No. 201215942, 201213926 and 201241499 alldisclosed an optical imaging lens constructed with an optical imaginglens having five lens elements. In each of these optical imaging lenses,the sum of all air gaps between the lens elements is excessive.

Taking Japan Patent Publication No. 2008-281760 for example, the lengthsof the imaging lens disclosed therein reaches 16 mm. Such configurationfails to achieve preferable small size of the whole system.

Therefore, there is needed to develop optical imaging lens with ashorter length, while also having good optical characters.

SUMMARY

An object of the present invention is to provide a mobile device and anoptical imaging lens thereof. With controlling the convex or concaveshape of the surfaces and/or the refracting power of the lens elements,the length of the optical imaging lens is shortened and meanwhile thegood optical characters, and system functionality are sustained.

In an exemplary embodiment, an optical imaging lens comprises,sequencially from an object side to an image side along an optical axis,comprises an aperture stop, first, second, third, fourth and fifth lenselements, each of the first, second, third, fourth and fifth lenselements having an object-side surface facing toward the object side andan image-side surface facing toward the image side, wherein: the firstlens element comprises positive refracting power, and the image-sidesurface thereof comprises a convex portion in a vicinity of a peripheryof the first lens element; the second lens element comprises negativerefracting power, the object-side surface thereof comprises a convexportion in a vicinity of the optical axis, and the image-side surfacethereof comprises a concave portion in a vicinity of a periphery of thesecond lens element; the object-side surface of the third lens elementcomprises a concave portion in a vicinity of a periphery of the thirdlens element, and the image-side surface of the third lens elementcomprises a convex portion in a vicinity of the optical axis; theobject-side surface of the fourth lens element is a concave surface; theimage-side surface of the fifth lens element comprises a concave portionin a vicinity of the optical axis and a convex portion in a vicinity ofa periphery of the fifth lens element; and the optical imaging lens as awhole comprises only the five lens elements having refracting power.

In another exemplary embodiment, some equation (s), such as thoserelating to the ratio among parameters could be taken intoconsideration. For example, an air gap between the first lens elementand the second lens element along the optical axis, G12, and an air gapbetween the fourth lens element and the fifth lens element along theoptical axis, G45, could be controlled to satisfy the equation asfollows:2.5≦G45/G12  Equation (1); or

G12 and a central thickness of the third lens element along the opticalaxis, T3, could be controlled to satisfy the equation as follows:T3/G12≦8.0  Equation (2); or

The sum of the thickness of all five lens elements along the opticalaxis is ALT and G12 could be controlled to satisfy the equation (s) asfollows:ALT/G12≦40.0  Equation (3); or23.0≦ALT/G12≦40.0  Equation (3′); or

The sum of all four air gaps from the first lens element to the fifthlens element along the optical axis, Gaa, and an air gap between thesecond lens element and the third lens element along the optical axis,G23, could be controlled to satisfy the equation as follows:2.4≦Gaa/G23≦3.1  Equation (4); or

A central thickness of the first lens element along the optical axis,T1, and a central thickness of the second lens element along the opticalaxis, T2, could be controlled to satisfy the equation as follows:2.3≦T1/T2  Equation (5); or

ALT and G23 could be controlled to satisfy the equation (s) as follows:5.0≦ALT/G23  Equation (6); or6.0≦ALT/G23  Equation (6′); or

G12 and G23 could be controlled to satisfy the equation as follows:4.0≦G23/G12≦6.8  Equation (7).

Aforesaid exemplary embodiments are not limited and could be selectivelyincorporated in other embodiments described herein.

In some exemplary embodiments, more details about the convex or concavesurface structure or the refracting power of the lens element(s) couldbe incorporated for one specific lens element or broadly for plural lenselements to enhance the control for the system performance and/orresolution. For example, the object-side surface of the third lenselement further comprises a convex portion in a vicinity of the opticalaxis, or the object-side surface of the fifth lens element furthercomprises a convex portion in a vicinity of the optical axis, etc. It isnoted that the details listed here could be incorporated in exampleembodiments if no inconsistency occurs.

In another exemplary embodiment, a mobile device comprising a housingand a photography module positioned in the housing is provided. Thephotography module comprises any of aforesaid example embodiments ofoptical imaging lens, a lens barrel, a module housing unit, a substrateand an image sensor. The lens barrel is for positioning the opticalimaging lens, the module housing unit is for positioning the lensbarrel, the substrate is for positioning the module housing unit; andthe image sensor is positioned on the substrate and at the image side ofthe optical imaging lens.

In some exemplary embodiments, the module housing unit optionallycomprises a seat element. The seat element exemplarily comprises a firstseat element and a second seat element, the first seat element ispositioned close to the outside of the lens barrel and along with anaxis for driving the lens barrel and the optical imaging lens positionedtherein to move along the axis, and the second seat element ispositioned along the axis and around the outside of the first seatelement. The module housing unit could optionally further comprises animage sensor base positioned between the second seat element and theimage sensor, and the image sensor base is closed to the second seatelement.

Through controlling the convex or concave shape of the surfaces and/orthe refraction power of the lens element(s), the mobile device and theoptical imaging lens thereof in exemplary embodiments achieve goodoptical characters and effectively shorten the length of the opticalimaging lens.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments will be more readily understood from the followingdetailed description when read in conjunction with the appended drawing,in which:

FIG. 1 is a cross-sectional view of one single lens element according tothe present disclosure;

FIG. 2 is a cross-sectional view of a first embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 3 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a first embodiment of the optical imaging lensaccording to the present disclosure;

FIG. 4 is a table of optical data for each lens element of a firstembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 5 is a table of aspherical data of a first embodiment of theoptical imaging lens according to the present disclosure;

FIG. 6 is a cross-sectional view of a second embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 7 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a second embodiment of the optical imaginglens according to the present disclosure;

FIG. 8 is a table of optical data for each lens element of the opticalimaging lens of a second embodiment of the present disclosure;

FIG. 9 is a table of aspherical data of a second embodiment of theoptical imaging lens according to the present disclosure;

FIG. 10 is a cross-sectional view of a third embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 11 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a third embodiment of the optical imaging lensaccording the present disclosure;

FIG. 12 is a table of optical data for each lens element of the opticalimaging lens of a third embodiment of the present disclosure;

FIG. 13 is a table of aspherical data of a third embodiment of theoptical imaging lens according to the present disclosure;

FIG. 14 is a cross-sectional view of a fourth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 15 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fourth embodiment of the optical imaginglens according the present disclosure;

FIG. 16 is a table of optical data for each lens element of the opticalimaging lens of a fourth embodiment of the present disclosure;

FIG. 17 is a table of aspherical data of a fourth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 18 is a cross-sectional view of a fifth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 19 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fifth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 20 is a table of optical data for each lens element of the opticalimaging lens of a fifth embodiment of the present disclosure;

FIG. 21 is a table of aspherical data of a fifth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 22 is a cross-sectional view of a sixth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 23 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a sixth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 24 is a table of optical data for each lens element of the opticalimaging lens of a sixth embodiment of the present disclosure;

FIG. 25 is a table of aspherical data of a sixth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 26 is a cross-sectional view of a seventh embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 27 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a seventh embodiment of the optical imaginglens according the present disclosure;

FIG. 28 is a table of optical data for each lens element of the opticalimaging lens of a seventh embodiment of the present disclosure;

FIG. 29 is a table of aspherical data of a seventh embodiment of theoptical imaging lens according to the present disclosure;

FIG. 30 is a cross-sectional view of an eighth embodiment of an opticalimaging lens having five lens elements according to the presentdisclosure;

FIG. 31 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of an eighth embodiment of the optical imaginglens according the present disclosure;

FIG. 32 is a table of optical data for each lens element of the opticalimaging lens of an eighth embodiment of the present disclosure;

FIG. 33 is a table of aspherical data of an eighth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 34 is a table for the values of T1, T2, T3, G12, G23, G45, Gaa,ALT, G45/G12, T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 and G23/G12 ofall eight example embodiments;

FIG. 35 is a structure of an example embodiment of a mobile device;

FIG. 36 is a partially enlarged view of the structure of another exampleembodiment of a mobile device.

DETAILED DESCRIPTION

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumbers indicate like features. Persons having ordinary skill in the artwill understand other varieties for implementing example embodiments,including those described herein. The drawings are not limited tospecific scale and similar reference numbers are used for representingsimilar elements. As used in the disclosures and the appended claims,the terms “example embodiment,” “exemplary embodiment,” and “presentembodiment” do not necessarily refer to a single embodiment, although itmay, and various example embodiments may be readily combined andinterchanged, without departing from the scope or spirit of the presentinvention. Furthermore, the terminology as used herein is for thepurpose of describing example embodiments only and is not intended to bea limitation of the invention. In this respect, as used herein, the term“in” may include “in” and “on”, and the terms “a”, “an” and “the” mayinclude singular and plural references. Furthermore, as used herein, theterm “by” may also mean “from”, depending on the context. Furthermore,as used herein, the term “if” may also mean “when” or “upon”, dependingon the context. Furthermore, as used herein, the words “and/or” mayrefer to and encompass any and all possible combinations of one or moreof the associated listed items.

Here in the present specification, “a lens element having positiverefracting power (or negative refracting power)” means that the lenselement comprises positive refracting power (or negative refractingpower) in the vicinity of the optical axis. “An object-side (orimage-side) surface of a lens element comprises a convex (or concave)portion in a specific region” means that the object-side (or image-side)surface of the lens element “protrudes outwardly (or depressesinwardly)” along the direction parallel to the optical axis at thespecific region, compared with the outer region radially adjacent to thespecific region. Taking FIG. 1 for example. The lens element showntherein is radially symmetric around the optical axis which is labeledby I. The object-side surface of the lens element comprises a convexportion at region A, a concave portion at region B, and another convexportion at region C. This is because compared with the outer regionradially adjacent to the region A (i.e. region B), the object-sidesurface protrudes outwardly at the region A, compared with the region C,the object-side surface depresses inwardly at the region B, and comparedwith the region E, the object-side surface protrudes outwardly at theregion C. Here, “in a vicinity of a periphery of a lens element” meansthat in a vicinity of the peripheral region of a surface for passingimaging light on the lens element, i.e. the region C as shown in FIG. 1.The imaging light comprises chief ray Lc and marginal ray Lm. “In avicinity of the optical axis” means that in a vicinity of the opticalaxis of a surface for passing the imaging light on the lens element,i.e. the region A as shown in FIG. 1. Further, a lens element couldcomprise an extending portion E for mounting the lens element in anoptical imaging lens. Ideally, the imaging light would not pass theextending portion E. Here the extending portion E is only for example,the structure and shape thereof are not limited to this specificexample. Please also noted that the extending portion of all the lenselements in the example embodiments shown below are skipped formaintaining the drawings clean and concise.

Example embodiments of an optical imaging lens may comprise an aperturestop, a first lens element, a second lens element, a third lens element,a fourth lens element and a fifth lens element, each of the lenselements comprises an object-side surface facing toward an object sideand an image-side surface facing toward an image side. These lenselements may be arranged sequencially from the object side to the imageside along an optical axis, and example embodiments of the lens as awhole may comprise only the five lens elements having refracting power.In an example embodiment: the first lens element comprises positiverefracting power, and the image-side surface thereof comprises a convexportion in a vicinity of a periphery of the first lens element; thesecond lens element comprises negative refracting power, the object-sidesurface thereof comprises a convex portion in a vicinity of the opticalaxis, and the image-side surface thereof comprises a concave portion ina vicinity of a periphery of the second lens element; the object-sidesurface of the third lens element comprises a concave portion in avicinity of a periphery of the third lens element, and the image-sidesurface of the third lens element comprises a convex portion in avicinity of the optical axis; the object-side surface of the fourth lenselement is a concave surface; the image-side surface of the fifth lenselement comprises a concave portion in a vicinity of the optical axisand a convex portion in a vicinity of a periphery of the fifth lenselement.

Preferably, the lens elements are designed in light of the opticalcharacteristics and the length of the optical imaging lens. For example,the first lens element having positive refracting power provides thedesired refracting power of the optical imaging lens. The convex portionin a vicinity of a periphery of the first lens element on the image-sidesurface thereof could assist in light converge ability. Further with theaperture stop positioned before the first lens element, the length ofthe optical imaging lens would be effectively shortened. The details onthe second, third and fourth lens element, comprising the negativerefracting power of the second lens element, the convex portion in avicinity of the optical axis on the object-side surface of the secondlens element, the concave portion in a vicinity of a periphery of thesecond lens element on the image-side surface thereof, the concaveportion in a vicinity of a periphery of the third lens element on theobject-side surface thereof, the convex portion in a vicinity of theoptical axis on the image-side surface of the third lens element and theconcave object-side surface of the fourth lens element, could assist ineliminating the aberration of the optical imaging lens. Further, with anoptional convex portion in a vicinity of the optical axis on theobject-side surface of the third lens element, the aberration of theoptical lens could be eliminated more and the image quality could bebetter. The concave portion in a vicinity of the optical axis and aconvex portion in a vicinity of a periphery of the fifth lens element onthe image-side surface thereof could assist in adjusting curvature aswell as depressing the angle of the chief ray (the incident angle of thelight onto the image sensor) for a better sensitivity. Combining withthe convex portion in a vicinity of the optical axis of the object-sidesurface of the fifth lens element, the length of the optical imaginglens could be shortened effectively. All these details could promote theimage quality of the whole system.

In another exemplary embodiment, some equation (s) of parameters, suchas those relating to the ratio among parameters could be taken intoconsideration. For example, an air gap between the first lens elementand the second lens element along the optical axis, G12, and an air gapbetween the fourth lens element and the fifth lens element along theoptical axis, G45, could be controlled to satisfy the equation asfollows:2.5≦G45/G12  Equation (1); or

G12 and a central thickness of the third lens element along the opticalaxis, T3, could be controlled to satisfy the equation as follows:T3/G12≦8.0  Equation (2); or

The sum of the thickness of all five lens elements along the opticalaxis is ALT and G12 could be controlled to satisfy the equation (s) asfollows:ALT/G12≦40.0  Equation (3); or23.0≦ALT/G12≦40.0  Equation (3′); or

The sum of all four air gaps from the first lens element to the fifthlens element along the optical axis, Gaa, and an air gap between thesecond lens element and the third lens element along the optical axis,G23, could be controlled to satisfy the equation as follows:2.4≦Gaa/G23≦3.1  Equation (4); or

A central thickness of the first lens element along the optical axis,T1, and a central thickness of the second lens element along the opticalaxis, T2, could be controlled to satisfy the equation as follows:2.3≦T1/T2  Equation (5); or

ALT and G23 could be controlled to satisfy the equation (s) as follows:5.0≦ALT/G23  Equation (6); or6.0≦ALT/G23  Equation (6′); or

G12 and G23 could be controlled to satisfy the equation as follows:4.0≦G23/G12≦6.8  Equation (7).

Aforesaid exemplary embodiments are not limited and could be selectivelyincorporated in other embodiments described herein.

Reference is now made to Equation (1). The value of G45/G12 ispreferable greater than or equal to 2.5 to satisfy Equation (1). This isbecause satisfying Equation (1) reflects that G12 as well as the lengthof the optical imaging lens are shortened properly, given that G12 iseasier to be shortened for the compatible convex portion in a vicinityof a periphery of the first lens element on the image-side surfacethereof and convex portion in a vicinity of the optical axis on theobject-side surface of the second lens element when assembling theselens elements. Additionally, the value of G45/G12 is suggested for anupper limit coming from modern manufacturing level, such as2.5≦G45/G12≦5.5.

Reference is now made to Equation (2). The value of T3/G12 is preferableless than or equal to 8.0 to satisfy Equation (2). This is becauseshortening the thickness of the third lens element is relatively easyand effective due to a smaller surface area for passing light thereof,compared with shortening the length of the other lens elements.Satisfying Equation (2) reflects that T3 as well as the length of theoptical imaging lens are shortened properly. Additionally, the value ofT3/G12 is suggested for a lower limit, such as 3.5≦T3/G12≦8.0.

Reference is now made to Equations (3) and (3′). The value of ALT/G12 ispreferable less than or equal to 40.0 to satisfy Equation (3) in lightof the manufacturing difficulty. This is because satisfying Equation (3)reflects that the sum of the thickness of all lens elements (ALT) andG12 are properly shortened for a shortened length of the optical imaginglens. Additionally, the value of ALT/G12 is suggested for a lower limit,such as 23.0≦ALT/G12≦40.0 to satisfy Equation (3′).

Reference is now made to Equations (4). The value of Gaa/G23 ispreferable greater than or equal to 2.4 and less than or equal to 3.1 tosatisfy Equation (4) in light of the manufacturing difficulty. This isbecause shortening Gaa is helpful for shortening the length of theoptical imaging lens and satisfying Equation (4) reflects that all theair gaps are proper for a shortened length of the optical imaging lens.

Reference is now made to Equation (5). The value of T1/T2 is preferablegreater than or equal to 2.3 to satisfy Equation (5). This is becauseshortening the thickness of the second lens element is relatively easyand effective due to the negative refracting power and a smaller surfacearea for passing light thereof, compared with shortening the length ofthe other lens elements, and on the contrary, the thickness of the firstlens element is relatively thick for providing almost the whole requiredpositive refracting power in the optical imaging lens. SatisfyingEquation (5) reflects that T2 is shortened properly. Additionally, thevalue of T1/T2 is suggested for an upper limit, such as 2.3≦T1/T2≦3.0.

Reference is now made to Equation (6). The value of ALT/G23 ispreferable greater than or equal to 5.0 to satisfy Equation (6) orgreater than or equal to 6.0 to satisfy Equation (6′) in light of themanufacturing difficulty. This is because G23 and ALT, both of which isgetting smaller and smaller along with shortening the length of theoptical imaging lens, would be proper if any of the equations issatisfied. When Equation (6′) is satisfied, relative smaller G23 as wellas Gaa would assist in configuring the thickness of the lens elements.Additionally, the value of ALT/G23 is suggested for an upper limit, suchas 5.0≦ALT/G23≦8.0.

Reference is now made to Equation (7). The value of G23/G12 ispreferable greater than or equal to 4.0 and less than or equal to 6.8 tosatisfy Equation (7). This is because satisfying Equation (7) reflectsthat G12 as well as G23 are shortened properly, given that G23 isusually greater than G12 for relatively easy in shortening G12 comparedwith shortening G23. Specifically, G12 is easier to be shortened for thecompatible convex portion in a vicinity of a periphery of the first lenselement on the image-side surface thereof and convex portion in avicinity of the optical axis on the object-side surface of the secondlens element when assembling these lens elements, but G23 is moredifficult and uneffective to be shortened for the inconsistent concaveportion in a vicinity of a periphery of the second lens element on theimage-side surface thereof and concave portion in a vicinity of aperiphery of the third lens element on the object-side surface thereofwhen assembling these lens elements.

When implementing example embodiments, more details about the convex orconcave surface structure and/or the refracting power may beincorporated for one specific lens element or broadly for plural lenselements to enhance the control for the system performance and/orresolution, as illustrated in the following embodiments. For example,the object-side surface of the third lens element further comprises aconvex portion in a vicinity of the optical axis, or the object-sidesurface of the fifth lens element further comprises a convex portion ina vicinity of the optical axis, etc. It is noted that the details listedhere could be incorporated in example embodiments if no inconsistencyoccurs.

Several exemplary embodiments and associated optical data will now beprovided for illustrating example embodiments of optical imaging lenswith good optical characters and a shortened length. Reference is nowmade to FIGS. 2-5. FIG. 2 illustrates an example cross-sectional view ofan optical imaging lens 1 having five lens elements of the opticalimaging lens according to a first example embodiment. FIG. 3 showsexample charts of longitudinal spherical aberration and other kinds ofoptical aberrations of the optical imaging lens 1 according to anexample embodiment. FIG. 4 illustrates an example table of optical dataof each lens element of the optical imaging lens 1 according to anexample embodiment. FIG. 5 depicts an example table of aspherical dataof the optical imaging lens 1 according to an example embodiment.

As shown in FIG. 2, the optical imaging lens 1 of the present embodimentcomprises, in order from an object side A1 to an image side A2 along anoptical axis, an aperture stop 100, a first lens element 110, a secondlens element 120, a third lens element 130, a fourth lens element 140and a fifth lens element 150. A filtering unit 160 and an image plane170 of an image sensor are positioned at the image side A2 of theoptical lens 1. Each of the first, second, third, fourth, fifth lenselements 110, 120, 130, 140, 150 and the filtering unit 160 comprises anobject-side surface 111/121/131/141/151/161 facing toward the objectside A1 and an image-side surface 112/122/132/142/152/162 facing towardthe image side A2. The example embodiment of the filtering unit 160illustrated is an IR cut filter (infrared cut filter) positioned betweenthe fifth lens element 150 and an image plane 170. The filtering unit160 selectively absorbs light with specific wavelength from the lightpassing optical imaging lens 1. For example, IR light is absorbed, andthis will prohibit the IR light which is not seen by human eyes fromproducing an image on the image plane 170.

Exemplary embodiments of each lens element of the optical imaging lens 1which may be constructed by plastic material will now be described withreference to the drawings.

An example embodiment of the first lens element 110 may comprisepositive refracting power. The object-side surface 111 and image-sidesurface 112 are convex surfaces. The image-side surface 112 comprises aconvex portion 1121 in a vicinity of a periphery of the first lenselement 110.

An example embodiment of the second lens element 120 may comprisenegative refracting power. The object-side surface 121 comprises aconvex portion 1211 in a vicinity of the optical axis, a convex portion1212 in a vicinity of a periphery of the second lens element 120 and aconcave portion 1213 between the vicinity of the optical axis and thevicinity of the periphery of the second lens element 120. The image-sidesurface 122 is a concave surface having a concave portion 1221 in avicinity of a periphery of the second lens element 120.

An example embodiment of the third lens element 130 may comprisepositive refracting power. The object-side surface 131 comprises aconvex portion 1311 in a vicinity of the optical axis and a concaveportion 1312 in a vicinity of a periphery of the third lens element 130.The image-side surface 132 is a convex surface having a convex portion1321 in a vicinity of the optical axis.

An example embodiment of the fourth lens element 140 may comprisepositive refracting power. The object-side surface 141 is a concavesurface, and the image-side surface 142 is a convex surface.

An example embodiment of the fifth lens element 150 may comprisenegative refracting power. The object-side surface 151 comprises aconvex portion 1511 in a vicinity of the optical axis and a concaveportion 1512 in a vicinity of a periphery of the fifth lens element 150.The image-side surface 152 comprises a concave portion 1521 in avicinity of the optical axis and a convex portion 1522 in a vicinity ofa periphery of the fifth lens element 150.

In example embodiments, air gaps exist between the lens elements 110,120, 130, 140, 150, the filtering unit 160 and the image plane 170 ofthe image sensor. For example, FIG. 1 illustrates the air gap d1existing between the first lens element 110 and the second lens element120, the air gap d2 existing between the second lens element 120 and thethird lens element 130, the air gap d3 existing between the third lenselement 130 and the fourth lens element 140, the air gap d4 existingbetween the fourth lens element 140 and the fifth lens element 150, theair gap d5 existing between the fifth lens element 150 and the filteringunit 160, and the air gap d6 existing between the filtering unit 160 andthe image plane 170 of the image sensor. However, in other embodiments,any of the aforesaid air gaps may or may not exist. For example, theprofiles of opposite surfaces of any two adjacent lens elements maycorrespond to each other, and in such situation, the air gap may notexist. The air gap d1 is denoted by AG12, the air gap d3 is denoted byAG34, and the sum of all air gaps d1, d2, d3 and d4 between the firstand fifth lens elements 110, 150 is denoted by Gaa.

FIG. 4 depicts the optical characters of each lens elements in theoptical imaging lens 1 of the present embodiment, wherein the values ofT1, T2, T3, G12, G23, G45, Gaa, ALT, G45/G12, T3/G12, ALT/G12, Gaa/G23,T1/T2, ALT/G23 and G23/G12 are:

T1=0.66 (mm);

T2=0.25 (mm);

T3=0.47 (mm);

G12=0.07 (mm);

G23=0.47 (mm);

G45=0.17 (mm);

Gaa=1.15 (mm);

ALT=2.62 (mm);

G45/G12=2.50, satisfying equation (1);

T3/G12=6.74, satisfying equation (2);

ALT/G12=37.54, satisfying equation (3), (3′);

Gaa/G23=2.42, satisfying equation (4);

T1/T2=2.64, satisfying equation (5);

ALT/G23=5.55, satisfying equation (6);

G23/G12=6.77, satisfying equation (7);

wherein the distance from the object-side surface 111 of the first lenselement 110 to the image plane 170 along the optical axis is 5.25 (mm),and the length of the optical imaging lens 1 is shortened.

The aspherical surfaces, including the object-side surface 111 and theimage-side surface 112 of the first lens element 110, the object-sidesurface 121 and the image-side surface 122 of the second lens element120, the object-side surface 131 and the image-side surface 132 of thethird lens element 130, the object-side surface 141 and the image-sidesurface 142 of the fourth lens element 140, and the object-side surface151 and the image-side surface 152 of the fifth lens element 150 are alldefined by the following aspherical formula:

${Z(Y)} = {{\frac{Y^{2}}{R}/\left( {1 + \sqrt{1 - {\left( {1 + K} \right)\frac{Y^{2}}{R^{2}}}}} \right)} + {\sum\limits_{i = 1}^{n}\;{a_{2\; i} \times Y^{2\; i}}}}$

wherein,

R represents the radius of curvature of the surface of the lens element;

Z represents the depth of the aspherical surface (the perpendiculardistance between the point of the aspherical surface at a distance Yfrom the optical axis and the tangent plane of the vertex on the opticalaxis of the aspherical surface);

Y represents the perpendicular distance between the point of theaspherical surface and the optical axis;

K represents a conic constant;

a_(2i) represents an aspherical coefficient of 2i^(th) level.

The values of each aspherical parameter are shown in FIG. 5.

As illustrated in FIG. 3, longitudinal spherical aberration (a), thecurves of different wavelengths are closed to each other. Thisrepresents off-axis light with respect to these wavelengths is focusedaround an image point. From the vertical deviation of each curve showntherein, the offset of the off-axis light relative to the image point iswithin ±0.03 (mm). Therefore, the present embodiment improves thelongitudinal spherical aberration with respect to different wavelengths.Additionally, the closed curves represent the image positions withrespect to different wavelengths are closed, and the chromaticaberration is also improved.

Please refer to FIG. 3, astigmatism aberration in the sagittal direction(b) and astigmatism aberration in the tangential direction (c). Thefocus variation with respect to the three wavelengths in the whole fieldfalls within ±0.04 (mm). This reflects the optical imaging lens 1 of thepresent embodiment eliminates aberration effectively. Additionally, theclosed curves represents dispersion is improved.

Please refer to FIG. 3, distortion aberration (d), which showing thevariation of the distortion aberration is within ±1%. Such distortionaberration meets the requirement of acceptable image quality and showsthe optical imaging lens 1 of the present embodiment could restrict thedistortion aberration to raise the image quality even though the lengthof the optical imaging lens 1 is shortened to less than 5.25 mm.

Therefore, the optical imaging lens 1 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 1 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 1is effectively shortened.

Reference is now made to FIGS. 6-9. FIG. 6 illustrates an examplecross-sectional view of an optical imaging lens 2 having five lenselements of the optical imaging lens according to a second exampleembodiment. FIG. 7 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 2 according to the second example embodiment. FIG. 8 shows anexample table of optical data of each lens element of the opticalimaging lens 2 according to the second example embodiment. FIG. 9 showsan example table of aspherical data of the optical imaging lens 2according to the second example embodiment. The reference numberslabeled in the present embodiment are similar to those in the firstembodiment for the similar elements, but here the reference numbers areinitialed with 2, for example, reference number 231 for labeling theobject-side surface of the third lens element 230, reference number 232for labeling the image-side surface of the third lens element 230, etc.

As shown in FIG. 6, the optical imaging lens 2 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 200, the first lens element210, a second lens element 220, a third lens element 230, a fourth lenselement 240 and a fifth lens element 250.

The differences between the second embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the second lenselement 220, but the refracting power and configuration of theconcave/convex shape of the lens elements (comprising the object-sidesurfaces 211, 231, 241, 251 facing to the object side A1 and theimage-side surfaces 212, 222, 232, 242, 252 facing to the image side A2)are similar to those in the first embodiment. Specifically, theobject-side surface 221 of the second lens element 220 is a convexsurface. Please refer to FIG. 8 for the optical characteristics of eachlens elements in the optical imaging lens 2 of the present embodiment,wherein the values of T1, T2, T3, G12, G23, G45, Gaa, ALT, G45/G12,T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 and G23/G12 are:

T1=0.63 (mm);

T2=0.25 (mm);

T3=0.56 (mm);

G12=0.07 (mm);

G23=0.41 (mm);

G45=0.20 (mm);

Gaa=1.07 (mm);

ALT=2.90 (mm);

G45/G12=2.69, satisfying equation (1);

T3/G12=7.75, satisfying equation (2);

ALT/G12=39.90, satisfying equation (3), (3′);

Gaa/G23=2.61, satisfying equation (4);

T1/T2=2.51, satisfying equation (5);

ALT/G23=7.06, satisfying equation (6), (6′);

G23/G12=5.65, satisfying equation (7);

wherein the distance from the object-side surface 211 of the first lenselement 210 to the image plane 270 along the optical axis is 5.21 (mm)and the length of the optical imaging lens 2 is shortened.

As shown in FIG. 7, the optical imaging lens 2 of the present embodimentshows great characteristics in longitudinal spherical aberration (a),astigmatism in the sagittal direction (b), astigmatism in the tangentialdirection (c), and distortion aberration (d). Therefore, according tothe above illustration, the optical imaging lens of the presentembodiment indeed shows great optical performance and the length of theoptical imaging lens 2 is effectively shortened.

Reference is now made to FIGS. 10-13. FIG. 10 illustrates an examplecross-sectional view of an optical imaging lens 3 having five lenselements of the optical imaging lens according to a third exampleembodiment. FIG. 11 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 3 according to the third example embodiment. FIG. 12 shows anexample table of optical data of each lens element of the opticalimaging lens 3 according to the third example embodiment. FIG. 13 showsan example table of aspherical data of the optical imaging lens 3according to the third example embodiment. The reference numbers labeledin the present embodiment are similar to those in the first embodimentfor the similar elements, but here the reference numbers are initialedwith 3, for example, reference number 331 for labeling the object-sidesurface of the third lens element 330, reference number 332 for labelingthe image-side surface of the third lens element 330, etc.

As shown in FIG. 10, the optical imaging lens 3 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 300, the first lens element310, a second lens element 320, a third lens element 330, a fourth lenselement 340 and a fifth lens element 350.

The differences between the third embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the second lenselement 320, but the refracting power and configuration of theconcave/convex shape of the lens elements (comprising the object-sidesurfaces 311, 331, 341, 351 facing to the object side A1 and theimage-side surfaces 312, 322, 332, 342, 352 facing to the image side A2)are similar to those in the first embodiment. Specifically, theobject-side surface 321 of the second lens element 320 is a convexsurface. Please refer to FIG. 12 for the optical characteristics of eachlens elements in the optical imaging lens 3 of the present embodiment,wherein the values of T1, T2, T3, G12, G23, G45, Gaa, ALT, G45/G12,T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 and G23/G12 are:

T1=0.59 (mm);

T2=0.25 (mm);

T3=0.51 (mm);

G12=0.08 (mm);

G23=0.35 (mm);

G45=0.20 (mm);

Gaa=0.98 (mm);

ALT=2.78 (mm);

G45/G12=2.50, satisfying equation (1);

T3/G12=6.55, satisfying equation (2);

ALT/G12=35.41, satisfying equation (3), (3′);

Gaa/G23=2.76, satisfying equation (4);

T1/T2=2.35, satisfying equation (5);

ALT/G23=7.83, satisfying equation (6), (6′);

G23/G12=4.52, satisfying equation (7);

wherein the distance from the object-side surface 311 of the first lenselement 310 to the image plane 370 along the optical axis is 5.17 (mm)and the length of the optical imaging lens 3 is shortened.

As shown in FIG. 11, the optical imaging lens 3 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 3 is effectively shortened.

Reference is now made to FIGS. 14-17. FIG. 14 illustrates an examplecross-sectional view of an optical imaging lens 4 having five lenselements of the optical imaging lens according to a fourth exampleembodiment. FIG. 15 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 4 according to the fourth embodiment. FIG. 16 shows an exampletable of optical data of each lens element of the optical imaging lens 4according to the fourth example embodiment. FIG. 17 shows an exampletable of aspherical data of the optical imaging lens 4 according to thefourth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 4, forexample, reference number 431 for labeling the object-side surface ofthe third lens element 430, reference number 432 for labeling theimage-side surface of the third lens element 430, etc.

As shown in FIG. 14, the optical imaging lens 4 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 400, the first lens element410, a second lens element 420, a third lens element 430, a fourth lenselement 440 and a fifth lens element 450.

The differences between the fourth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the second lenselement 420, but the refracting power and configuration of theconcave/convex shape of the lens elements (comprising the object-sidesurfaces 411, 431, 441, 451 facing to the object side A1 and theimage-side surfaces 412, 422, 432, 442, 452 facing to the image side A2)are similar to those in the first embodiment. Specifically, theobject-side surface 421 of the second lens element 420 is a convexsurface. Please refer to FIG. 16 for the optical characteristics of eachlens elements in the optical imaging lens 4 of the present embodiment,wherein the values of T1, T2, T3, G12, G23, G45, Gaa, ALT, G45/G12,T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 and G23/G12 are:

T1=0.58 (mm);

T2=0.25 (mm);

T3=0.45 (mm);

G12=0.07 (mm);

G23=0.36 (mm);

G45=0.17 (mm);

Gaa=0.98 (mm);

ALT=2.72 (mm);

G45/G12=2.50, satisfying equation (1);

T3/G12=6.53, satisfying equation (2);

ALT/G12=39.32, satisfying equation (3), (3′);

Gaa/G23=2.71, satisfying equation (4);

T1/T2=2.30, satisfying equation (5);

ALT/G23=7.54, satisfying equation (6), (6′);

G23/G12=5.22, satisfying equation (7);

wherein the distance from the object-side surface 411 of the first lenselement 410 to the image plane 470 along the optical axis is 5.15 (mm)and the length of the optical imaging lens 4 is shortened.

As shown in FIG. 15, the optical imaging lens 4 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 4 is effectively shortened.

Reference is now made to FIGS. 18-21. FIG. 18 illustrates an examplecross-sectional view of an optical imaging lens 5 having five lenselements of the optical imaging lens according to a fifth exampleembodiment. FIG. 19 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 5 according to the fifth embodiment. FIG. 20 shows an example tableof optical data of each lens element of the optical imaging lens 5according to the fifth example embodiment. FIG. 21 shows an exampletable of aspherical data of the optical imaging lens 5 according to thefifth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 5, forexample, reference number 531 for labeling the object-side surface ofthe third lens element 530, reference number 532 for labeling theimage-side surface of the third lens element 530, etc.

As shown in FIG. 18, the optical imaging lens 5 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 500, the first lens element510, a second lens element 520, a third lens element 530, a fourth lenselement 540 and a fifth lens element 550.

The differences between the fifth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the second lenselement 520, but the refracting power and configuration of theconcave/convex shape of the lens elements (comprising the object-sidesurfaces 511, 531, 541, 551 facing to the object side A1 and theimage-side surfaces 512, 522, 532, 542, 552 facing to the image side A2)are similar to those in the first embodiment. Specifically, theobject-side surface 521 of the second lens element 520 comprises aconcave portion 5212 in a vicinity of a periphery of the second lenselement 520. Please refer to FIG. 20 for the optical characteristics ofeach lens elements in the optical imaging lens 5 of the presentembodiment, wherein the values of T1, T2, T3, G12, G23, G45, Gaa, ALT,G45/G12, T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 and G23/G12 are:

T1=0.64 (mm);

T2=0.25 (mm);

T3=0.45 (mm);

G12=0.07 (mm);

G23=0.42 (mm);

G45=0.34 (mm);

Gaa=1.07 (mm);

ALT=2.60 (mm);

G45/G12=5.23, satisfying equation (1);

T3/G12=6.92, satisfying equation (2);

ALT/G12=39.90, satisfying equation (3), (3′);

Gaa/G23=2.53, satisfying equation (4);

T1/T2=2.59, satisfying equation (5);

ALT/G23=6.15, satisfying equation (6), (6′);

G23/G12=6.49, satisfying equation (7);

wherein the distance from the object-side surface 511 of the first lenselement 510 to the image plane 570 along the optical axis is 5.25 (mm)and the length of the optical imaging lens 5 is shortened.

As shown in FIG. 19, the optical imaging lens 5 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 5 is effectively shortened.

Reference is now made to FIGS. 22-25. FIG. 22 illustrates an examplecross-sectional view of an optical imaging lens 6 having five lenselements of the optical imaging lens according to a sixth exampleembodiment. FIG. 23 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 6 according to the sixth embodiment. FIG. 24 shows an example tableof optical data of each lens element of the optical imaging lens 6according to the sixth example embodiment. FIG. 25 shows an exampletable of aspherical data of the optical imaging lens 6 according to thesixth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 6, forexample, reference number 631 for labeling the object-side surface ofthe third lens element 630, reference number 632 for labeling theimage-side surface of the third lens element 630, etc.

As shown in FIG. 22, the optical imaging lens 6 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 600, the first lens element610, a second lens element 620, a third lens element 630, a fourth lenselement 640 and a fifth lens element 650.

The differences between the sixth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the second lenselement 620 and fifth lens element 650, but the refracting power andconfiguration of the concave/convex shape of the lens elements(comprising the object-side surfaces 611, 631, 641 facing to the objectside A1 and the image-side surfaces 612, 622, 632, 642, 652 facing tothe image side A2) are similar to those in the first embodiment.Specifically, the object-side surface 621 of the second lens element 620is a convex surface and the object-side surface 651 of the fifth lenselement 650 comprises a convex portion 6511 in a vicinity of the opticalaxis and a concave portion 6512 in a vicinity of a periphery of thefifth lens element 650. Please refer to FIG. 24 for the opticalcharacteristics of each lens elements in the optical imaging lens 6 ofthe present embodiment, wherein the values of T1, T2, T3, G12, G23, G45,Gaa, ALT, G45/G12, T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 and G23/G12are:

T1=0.59 (mm);

T2=0.25 (mm);

T3=0.38 (mm);

G12=0.08 (mm);

G23=0.39 (mm);

G45=0.28 (mm);

Gaa=0.98 (mm);

ALT=2.66 (mm);

G45/G12=3.50, satisfying equation (1);

T3/G12=4.68, satisfying equation (2);

ALT/G12=33.00, satisfying equation (3), (3′);

Gaa/G23=2.49, satisfying equation (4);

T1/T2=2.40, satisfying equation (5);

ALT/G23=6.77, satisfying equation (6), (6′);

G23/G12=4.88, satisfying equation (7);

wherein the distance from the object-side surface 611 of the first lenselement 610 to the image plane 670 along the optical axis is 5.01 (mm)and the length of the optical imaging lens 6 is shortened.

As shown in FIG. 23, the optical imaging lens 6 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 6 is effectively shortened.

Reference is now made to FIGS. 26-29. FIG. 26 illustrates an examplecross-sectional view of an optical imaging lens 7 having five lenselements of the optical imaging lens according to a seventh exampleembodiment. FIG. 27 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 7 according to the seventh embodiment. FIG. 28 shows an exampletable of optical data of each lens element of the optical imaging lens 7according to the seventh example embodiment. FIG. 29 shows an exampletable of aspherical data of the optical imaging lens 7 according to theseventh example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 7, forexample, reference number 731 for labeling the object-side surface ofthe third lens element 730, reference number 732 for labeling theimage-side surface of the third lens element 730, etc.

As shown in FIG. 26, the optical imaging lens 7 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 700, the first lens element710, a second lens element 720, a third lens element 730, a fourth lenselement 740 and a fifth lens element 750.

The differences between the seventh embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the second lenselement 720 and fifth lens element 750, but the refracting power andconfiguration of the concave/convex shape of the lens elements(comprising the object-side surfaces 711, 731, 741 facing to the objectside A1 and the image-side surfaces 712, 722, 732, 742, 752 facing tothe image side A2) are similar to those in the first embodiment.Specifically, the object-side surface 721 of the second lens element 720comprises a concave portion 7212 in a vicinity of a periphery of thesecond lens element 720 and the object-side surface 751 of the fifthlens element 750 comprises a convex portion 7511 in a vicinity of theoptical axis, a convex portion 7512 in a vicinity of a periphery of thefifth lens element 750 and a concave portion 7513 between the vicinityof the optical axis and the vicinity of the periphery of the firth lenselement 750. Please refer to FIG. 28 for the optical characteristics ofeach lens elements in the optical imaging lens 7 of the presentembodiment, wherein the values of T1, T2, T3, G12, G23, G45, Gaa, ALT,G45/G12, T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 and G23/G12 are:

T1=0.59 (mm);

T2=0.25 (mm);

T3=0.32 (mm);

G12=0.08 (mm);

G23=0.36 (mm);

G45=0.19 (mm);

Gaa=1.09 (mm);

ALT=2.74 (mm);

G45/G12=2.50, satisfying equation (1);

T3/G12=4.28, satisfying equation (2);

ALT/G12=36.18, satisfying equation (3), (3′);

Gaa/G23=3.00, satisfying equation (4);

T1/T2=2.38, satisfying equation (5);

ALT/G23=7.53, satisfying equation (6), (6′);

G23/G12=4.80, satisfying equation (7);

wherein the distance from the object-side surface 711 of the first lenselement 710 to the image plane 770 along the optical axis is 5.04 (mm)and the length of the optical imaging lens 7 is shortened.

As shown in FIG. 27, the optical imaging lens 7 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 7 is effectively shortened.

Reference is now made to FIGS. 30-33. FIG. 30 illustrates an examplecross-sectional view of an optical imaging lens 8 having five lenselements of the optical imaging lens according to a eighth exampleembodiment. FIG. 31 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 8 according to the eighth embodiment. FIG. 32 shows an exampletable of optical data of each lens element of the optical imaging lens 8according to the eighth example embodiment. FIG. 33 shows an exampletable of aspherical data of the optical imaging lens 8 according to theeighth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 8, forexample, reference number 831 for labeling the object-side surface ofthe third lens element 830, reference number 832 for labeling theimage-side surface of the third lens element 830, etc.

As shown in FIG. 30, the optical imaging lens 8 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 800, the first lens element810, a second lens element 820, a third lens element 830, a fourth lenselement 840 and a fifth lens element 850.

The differences between the eighth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap and the surface shape of the second lenselement 820, but the refracting power and configuration of theconcave/convex shape of the lens elements (comprising the object-sidesurfaces 811, 831, 841, 851 facing to the object side A1 and theimage-side surfaces 812, 822, 832, 842, 852 facing to the image side A2)are similar to those in the first embodiment. Specifically, theobject-side surface 821 of the second lens element 820 comprises aconcave portion 8212 in a vicinity of a periphery of the second lenselement 820. Please refer to FIG. 32 for the optical characteristics ofeach lens elements in the optical imaging lens 8 of the presentembodiment, wherein the values of T1, T2, T3, G12, G23, G45, Gaa, ALT,G45/G12, T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 and G23/G12 are:

T1=0.58 (mm);

T2=0.25 (mm);

T3=0.39 (mm);

G12=0.10 (mm);

G23=0.39 (mm);

G45=0.43 (mm);

Gaa=1.12 (mm);

ALT=2.49 (mm);

G45/G12=4.51, satisfying equation (1);

T3/G12=4.09, satisfying equation (2);

ALT/G12=26.01, satisfying equation (3), (3′);

Gaa/G23=2.86, satisfying equation (4);

T1/T2=2.36, satisfying equation (5);

ALT/G23=6.34, satisfying equation (6), (6′);

G23/G12=4.10, satisfying equation (7);

wherein the distance from the object-side surface 811 of the first lenselement 810 to the image plane 870 along the optical axis is 4.99 (mm)and the length of the optical imaging lens 8 is shortened.

As shown in FIG. 31, the optical imaging lens 8 of the presentembodiment shows great characteristics in longitudinal sphericalaberration (a), astigmatism in the sagittal direction (b), astigmatismin the tangential direction (c), and distortion aberration (d).Therefore, according to the above illustration, the optical imaging lensof the present embodiment indeed shows great optical performance and thelength of the optical imaging lens 8 is effectively shortened.

Please refer to FIG. 34, which shows the values of T1, T2, T3, G12, G23,G45, Gaa, ALT, G45/G12, T3/G12, ALT/G12, Gaa/G23, T1/T2, ALT/G23 andG23/G12 of all eight embodiments, and it is clear that the opticalimaging lens of the present invention satisfy the Equations (1), (2),(3) and/or (3′), (4), (5), (6) and/or (6′) and/or (7).

Reference is now made to FIG. 35, which illustrates an examplestructural view of a first embodiment of mobile device 20 applying anaforesaid optical imaging lens. The mobile device 20 comprises a housing21 and a photography module 22 positioned in the housing 21. An exampleof the mobile device 20 may be, but is not limited to, a mobile phone.

As shown in FIG. 35, the photography module 22 may comprise an aforesaidoptical imaging lens with five lens elements, for example the opticalimaging lens 1 of the first embodiment, a lens barrel 23 for positioningthe optical imaging lens 1, a module housing unit 24 for positioning thelens barrel 23, a substrate 172 for positioning the module housing unit24, and an image sensor 171 which is positioned at an image side of theoptical imaging lens 1. The image plane 170 is formed on the imagesensor 171.

In some other example embodiments, the structure of the filtering unit160 may be omitted. In some example embodiments, the housing 21, thelens barrel 23, and/or the module housing unit 24 may be integrated intoa single component or assembled by multiple components. In some exampleembodiments, the image sensor 171 used in the present embodiment isdirectly attached to a substrate 172 in the form of a chip on board(COB) package, and such package is different from traditional chip scalepackages (CSP) since COB package does not require a cover glass beforethe image sensor 171 in the optical imaging lens 1. Aforesaid exemplaryembodiments are not limited to this package type and could beselectively incorporated in other described embodiments.

The five lens elements 110, 120, 130, 140, 150 are positioned in thelens barrel 23 in the way of separated by an air gap between any twoadjacent lens elements.

The module housing unit 24 comprises a seat element 2401 for positioningthe lens barrel 23 and an image sensor base 2406 positioned between theseat element 2401 and the image sensor 171. The lens barrel 23 and theseat element 2401 are positioned along a same axis I-I′, and the seatelement 2401 is close to the outside of the lens barrel 23. The imagesensor base 2406 is exemplarily close to the seat element 2401 here. Theimage sensor base 2406 could be optionally omitted in some otherembodiments of the present invention.

Because the length of the optical imaging lens 1 is merely 5.25 (mm),the size of the mobile device 20 may be quite small. Therefore, theembodiments described herein meet the market demand for smaller sizedproduct designs.

Reference is now made to FIG. 36, which shows another structural view ofa second embodiment of mobile device 20′ applying the aforesaid opticalimaging lens 1. One difference between the mobile device 20′ and themobile device 20 may be the seat element 2401 comprising a first seatunit 2402, a second seat unit 2403, a coil 2404 and a magnetic unit2405. The first seat unit 2402 is close to the outside of the lensbarrel 23, and positioned along an axis I-I′, and the second seat unit2403 is around the outside of the first seat unit 2402 and positionedalong with the axis I-I′. The coil 2404 is positioned between the firstseat unit 2402 and the inside of the second seat unit 2403. The magneticunit 2405 is positioned between the outside of the coil 2404 and theinside of the second seat unit 2403.

The lens barrel 23 and the optical imaging lens 1 positioned therein aredriven by the first seat unit 2402 for moving along the axis I-I′. Therest structure of the mobile device 20′ is similar to the mobile device20.

Similarly, because the length of the optical imaging lens 1, 5.25 (mm),is shortened, the mobile device 20′ may be designed with a smaller sizeand meanwhile good optical performance is still provided. Therefore, thepresent embodiment meets the demand of small sized product design andthe request of the market.

According to above illustration, it is clear that the mobile device andthe optical imaging lens thereof in example embodiments, throughcontrolling the detail structure and/or reflection power of the lenselements, the length of the optical imaging lens is effectivelyshortened and meanwhile good optical characters are still provided.

While various embodiments in accordance with the disclosed principlesbeen described above, it should be understood that they are presented byway of example only, and are not limiting. Thus, the breadth and scopeof exemplary embodiment(s) should not be limited by any of theabove-described embodiments, but should be defined only in accordancewith the claims and their equivalents issuing from this disclosure.Furthermore, the above advantages and features are provided in describedembodiments, but shall not limit the application of such issued claimsto processes and structures accomplishing any or all of the aboveadvantages.

Additionally, the section headings herein are provided for consistencywith the suggestions under 37 C.F.R. 1.77 or otherwise to provideorganizational cues. These headings shall not limit or characterize theinvention(s) set out in any claims that may issue from this disclosure.Specifically, a description of a technology in the “Background” is notto be construed as an admission that technology is prior art to anyinvention(s) in this disclosure. Furthermore, any reference in thisdisclosure to “invention” in the singular should not be used to arguethat there is only a single point of novelty in this disclosure.Multiple inventions may be set forth according to the limitations of themultiple claims issuing from this disclosure, and such claimsaccordingly define the invention(s), and their equivalents, that areprotected thereby. In all instances, the scope of such claims shall beconsidered on their own merits in light of this disclosure, but shouldnot be constrained by the headings herein.

What is claimed is:
 1. An optical imaging lens, sequentially from anobject side to an image side along an optical axis, comprising anaperture stop, first, second, third, fourth and fifth lens elements,each of said first, second, third, fourth and fifth lens elements havingan object-side surface facing toward the object side and an image-sidesurface facing toward the image side, wherein: said first lens elementcomprises positive refracting power, and said image-side surface thereofcomprises a convex portion in a vicinity of a periphery of the firstlens element; said second lens element comprises negative refractingpower, said object-side surface thereof comprises a convex portion in avicinity of the optical axis, and said image-side surface thereofcomprises a concave portion in a vicinity of a periphery of the secondlens element; said object-side surface of said third lens elementcomprises a concave portion in a vicinity of a periphery of the thirdlens element, and said image-side surface of said third lens elementcomprises a convex portion in a vicinity of the optical axis; saidobject-side surface of said fourth lens element is a concave surface;said image-side surface of said fifth lens element comprises a concaveportion in a vicinity of the optical axis and a convex portion in avicinity of a periphery of the fifth lens element; and the opticalimaging lens as a whole comprises only the five lens elements havingrefracting power.
 2. A mobile device, comprising: a housing; and aphotography module positioned in the housing and comprising: the opticalimaging lens as claimed in claim 1; a lens barrel for positioning theoptical imaging lens; a module housing unit for positioning the lensbarrel; a substrate for positioning the module housing unit; and animage sensor positioned on the substrate and at the image side of theoptical imaging lens.
 3. The mobile device according to claim 2, whereinthe module housing unit comprises a seat element comprising a first seatelement and a second seat element, the first seat element is positionedclose to the outside of the lens barrel and along with an axis fordriving the lens barrel and the optical imaging lens positioned thereinto move along the axis, and the second seat element is positioned alongthe axis and around the outside of the first seat element.
 4. The mobiledevice according to claim 3, wherein the module housing unit furthercomprises an image sensor base positioned between the second seatelement and the image sensor, and the image sensor base is closed to thesecond seat element.
 5. The optical imaging lens according to claim 1,wherein an air gap between the first lens element and the second lenselement along the optical axis is G12, a central thickness of the thirdlens element along the optical axis is T3, and T3 and G12 satisfy theequation:T3/G12≦8.0.
 6. The optical imaging lens according to claim 5, whereinthe sum of the thickness of all five lens elements along the opticalaxis is ALT, and G12 and ALT satisfy the equation:23.0≦ALT/G12≦40.0.
 7. The optical imaging lens according to claim 6,wherein said object-side surface of said third lens element furthercomprises a convex portion in a vicinity of the optical axis.
 8. Theoptical imaging lens according to claim 1, wherein an air gap betweenthe first lens element and the second lens element along the opticalaxis is G12, the sum of the thickness of all five lens elements alongthe optical axis is ALT, and G12 and ALT satisfy the equation:ALT/G12≦40.0.
 9. The optical imaging lens according to claim 8, whereinan air gap between the second lens element and the third lens elementalong the optical axis is G23, and G23 and ALT further satisfy theequation:5.0≦ALT/G23.
 10. The optical imaging lens according to claim 9, whereinG12 and G23 further satisfy the equation:4.0≦G23/G12≦6.8.
 11. The optical imaging lens according to claim 1,wherein an air gap between the first lens element and the second lenselement along the optical axis is G12, an air gap between the fourthlens element and the fifth lens element along the optical axis is G45,and G12 and G45 satisfy the equation:2.5≦G45/G12.
 12. The optical imaging lens according to claim 11, whereinthe sum of the thickness of all five lens elements along the opticalaxis is ALT, and G12 and ALT satisfy the equation:ALT/G12≦40.0.
 13. The optical imaging lens according to claim 12,wherein an air gap between the second lens element and the third lenselement along the optical axis is G23, and G23 and ALT satisfy theequation:6.0≦ALT/G23.
 14. The optical imaging lens according to claim 11, whereina central thickness of the third lens element along the optical axis isT3, and G12 and T3 satisfy the equation:T3/G12≦8.0.
 15. The optical imaging lens according to claim 14, whereina central thickness of the first lens element along the optical axis isT1, a central thickness of the second lens element along the opticalaxis is T2, and T1 and T2 satisfy the equation:2.3≦T1/T2.
 16. The optical imaging lens according to claim 15, whereinsaid object-side surface of said fifth lens element further comprises aconvex portion in a vicinity of the optical axis.
 17. The opticalimaging lens according to claim 15, wherein the sum of all four air gapsfrom the first lens element to the fifth lens element along the opticalaxis is Gaa, an air gap between the second lens element and the thirdlens element along the optical axis is G23, and Gaa and G23 satisfy theequation:2.4≦Gaa/G23≦3.1.